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    As a side note, sorry if I'm not posting the question on the right website. I'm a bit confused about the difference between unix.stackexchange, Super User and Server Fault since this question seems to be on-topic for these 3 websites. Commented Dec 16, 2018 at 12:01
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    check out cpulimit as in this answer: unix.stackexchange.com/a/39730/3375 Commented Dec 16, 2018 at 12:27
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    Have you tried limiting the output of tar using something like pv, as you mentioned? Commented Dec 16, 2018 at 21:53
  • Be careful, gtar in general is unable to restore it's incremental backups. This only works in case that the differences between two incrementals are trivial and do not include renamed directories. Commented Dec 17, 2018 at 16:23
  • For completeness -and for tips for us noobs- can you include how you can use pv to limit the output rate? (edit: ah, rtfm... its in linux.die.net/man/1/pv) Commented Jan 19, 2021 at 12:35